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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 44: Poster: Biomaterials and Biopolymers

CPP 44.2: Poster

Wednesday, March 9, 2016, 18:15–21:00, Poster B2

Fabrication and Analysis of graphene quantum dots synthesized by the Electrolysis of Graphite — •Sonja Allani, Stefan Fasbender, and Thomas Heinzel — Heinrich Heine Universität Düsseldorf

Fluorescent graphene quantum dots (GQDs) are prepared by the electrolysis of graphite rods in aqueous solution of NaOH and subsequent treatment with hydrazine hydrate. The method described by Zhang et al. [1] is modified and the influence of the synthesis parameters on the GQDs fluorescence and size is investigated. In order to sort the GQDs by size, dialysis with different membrane pore sizes is realized. Dialysis is also used to obtain a pure GQD solution of pH = 7, providing the opportunity for future use in bioimaging applications. Fluorescence and absorbance spectra are taken and Atomic Force Microscopy is used to determine the GQDs size and shape.

[1] Zhang et al., J. Mater. Chem., 2012, 22, 7461-7467